<?php
/**
 * crcl/base
 *
 * Copyright 2013 CRCL - André Sabosch - info@crcl.de
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

namespace crcl\base\template\container\xhtml\instructions;

interface IContent
{
}

class ContainerContent extends Concrete implements IContent, IConcrete
{
  const ATTRIBUTE_ATTRIBUTE = 'attribute';
  const ATTRIBUTE_CONTENT = 'content';
  const ATTRIBUTE_FILTER = 'filter';

  public function start()
  {
    $oTrigger = new \crcl\base\template\Trigger();
    if ($this->hasAttribute(self::ATTRIBUTE_ATTRIBUTE))
    {
      $oTrigger->setScope(
        \crcl\base\template\container\xhtml\Instruction::SCOPE_NEXT_ATTRIBUTE_REPLACE);
    }
    else
    {
      $oTrigger->setScope(\crcl\base\template\container\xhtml\Instruction::SCOPE_CURRENT);
    }
    $oTrigger->setInstruction($this);

    return $oTrigger;
  }

  public function executeCurrent()
  {
    if (!$this->hasAttribute(self::ATTRIBUTE_ATTRIBUTE))
    {
      $sVar = $this->getAttribute(self::ATTRIBUTE_CONTENT);
      $sFilter = $this->getAttributeFalse(self::ATTRIBUTE_FILTER);
      $this->sContent = $this->compileVar($sVar, $sFilter);
    }
  }

  public function executeNext($sTag, $aAttributes)
  {
    $sAttribute = $this->getAttribute(self::ATTRIBUTE_ATTRIBUTE);
    $sVar = $this->getAttribute(self::ATTRIBUTE_CONTENT);
    $sFilter = $this->getAttributeFalse(self::ATTRIBUTE_FILTER);
    $sOutput = $this->compileVar($sVar, $sFilter);

    $this->aContentAttributes = array_merge($aAttributes, array($sAttribute => $sOutput));
  }

  /** PROTECTED ***********************************************************************************/

  protected $aAllowedAttributes = array('content', 'attribute', 'filter');

  /** PRIVATE *************************************************************************************/


  private function compileVar($sTerm, $sFilter)
  {
    if (\strpos($sTerm, '$') === \FALSE)
    {
      $sOut = $sTerm; //totally fixed
    }
    else
    {
      //dynamic and mixed
      $sTerm = \str_replace('\'', '\\\'', $sTerm);
      if (!$sFilter)
      {
        $sOut = '{$oValues->out(\'' . $sTerm . '\')}';
      }
      else
      {
        $sOut = '{$oValues->out(\'' . $sTerm . '\', \'' . $sFilter . '\')}';
      }
    }

    return $sOut;
  }
}